<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const date = new Date("2020-12-21 13:30:20");
      console.log(date.getTime());
      console.log(+date);
      console.log(date.getTimezoneOffset());
    </script>
  </body>
</html>
